Open-hearth-furnace door and frame



G. LAW.

OPEN HEARTH FURNACE DUUR AND FRAME.

APPLICATION man JuL-Y 15, 1920.

1,391,197, Patentedsepnzo, 1921.

2 SHEETS-SHEET- I.

@Wm/nap G. LAw.

OPEN HEARTHl FURNACE DOOR AND FRAME. APPLlcATloN r'lLED JULY x5, |920.

1,391,197. Pamdsepn 2o, 1921.'

2 SHEETS-SHEET 2.

UNITED STATES" PATENT OFFICE;

(molten LAW, 0F YORK, PENNSYLVANIA.

oPEN-HEARTH-EUENACE noon AND FRAME.

. Application led July 15,

To all LU/wm t may Concern.'

Be it known that I, GEORGE LAW, a citizen of the vUnited' States,residing at York, in the county of York and State of Pennsylvania, haveinvented certain'new and useful Improvements in Open- I-Iearth FurnaceYY Doors and Frames; and I do declare the following to be a full, clear,and exact descr1ption of the invention, such as will enable othersskilled in the art to which it appertains to make and use the same.

My invention relates to water-cooledr frames and doors for furnaces,ydesigned more particularly for use in connection with furnaces of theopen hearth type, employed in metal smelting.

The principal objects of this invention are to provide an archedwater-cooled frame formed of sections secured in the door opening of thefurnace in a novel manner which renders them readily removableforyrepairs or renewing; to connect the sections'of the arched frame ina manner to prevent iame from licking through the joints between themand between the frame and door; and

vto provide the vertical legs of the frame with rearwardly diverginginner sides, thereby allowing the usual `metal supply bucket to swingfrom side to side for equally distributing metal in the furnace andpermitting withdrawal of said bucket without catching on the legs, asnowoften occurs.r

`With the foregoing in view, the invention resides in the novelconstruction and combination of parts hereinafter described and claimed,the descriptive matter beingA supplemented by the accompanying drawings,forming a part of this specification.

Figure 1 is a front elevation of aportion of an open hearth metalfurnace equipped with my improved door and door frame.

Fig. 2 is a top plan view of the door and door frame showing the furnacewall in horizontal section.

Specification ofLetters Patent. Y Patented Sept. 1921- 192e. serial No.396,395.

the numeral' 1 desgnatsa portion of an open hearthv metal furnace, saidfurnace v "having a rectangular door opening2 whose lower side isprovided with the usual or any preferred dead platel 3 which projectsforwardly fromt-he furnace wall as shown forl instancev in Figs. 2 and4. Extending across the upper end ofthe opening 2 and supporting' theportion of the wall above said open-V ing, is a horizontal beam 4 whichis preferably of the channeled type illustrated mostL clearly in Fig. 4,although itv will bek understood that said beam might be of other crosssectional shape if desired. This beam not only supports the portion ofthe wall 1 over the opening 2', but it serves as the principal anchoringmeans for the detachable water-` cooled frame for the opening 2.v

The'door frame above mentioned, as illustrated most clearly in Figs. 4,5 and 6, comprises two inverted L shaped sections 5 being in contactwith the vertical sides of the opening 2, `while the horizontal reaches7 of the vtwo sections which reaches form Y. 'the crown of the arch,bear againstl the up# per edge wall of the opening, the free ends ofsaid reaches being in abutting relation with each 'other` as shown inFigs. 2 andrG. These abutting ends are provided with an interitting beadand groove 8 and 9 respectively,which not only hold said ends againstrelative inward and outward'movement, but

n prevent flame from licking through the joint between the twosections.l The parts 7 of the frame section 5 are secured together atable way, but the upper sides Vof these parts are 'by preferenceconnected ina different manner, namely by bolting the upturned ends 12of the longitudinal angle-irons 13 together, as indicated at 14. Oneflange of the angle-iron bars 13 is secured to the frame section byrivets, whilethe other flange is embedded in the wall 1as shown clearlyin Fig. 4,fthereby serving as means for partially anchoring the upperends of the frame sections.

-which jointly form an arched vdoor frame, .the vertical sides or legs 6of said frame vtheir lowerY sides by means of bolts 10 passf ing throughangle-irons 11 which are secured to said parts by welding or in anyother suit- The upper and lower halves of the back walls 15 of thereaches 7, lare horizontally offset as shown most clearly in Fig. 4,thereby providing a horizontal ledge 16 and a vertical wall 17 risingtherefrom, these parts 16 and 17 jointly forming a seat which snuglyreceives the beam 4L above described.

YBoth sections 5 are bolted to this beam as shown at 1.8 in Fig. 4 andit will thus be seen that at their upper ends, said'sections will berigidly held in place, but may be readily "detached whenever one or bothof the frame v sections should be removed for repairing or renewing. Tosecure the lower ends of the sections 5 in place, the legs 6 areprovided withl forwardly extending feet 19 which are f secured by bolts20 to the dead plate 3.

To permit the usual metal supply bucket "(not shown) to be swung freelyfrom side to side when it is inserted through the openingr ofthe-door'frame, and to prevent catching ywardly diverging relationthroughout their width as shown at 21 in Figs. 3 and 6. Thisconstruction is also of advantage in effecting ,pouring of the moltenmetal from the fur- 'filled at all times with water. `supplied throughpipes 22 leading to the nace.v When the frame comes in contact with themolten metal, it would begreatly injured,

vwere it not forV thefact that the sections 5 are of hollow formationandare completely Cold water is lower ends of the legs 6 and as thewater is lheated within the frame, it is withdrawn through pipes 23rising from the upper ends of sait frame. Vents 211 rise from bothsections of the frame to allow the escape of any v'gsteam which mightbe'fornied therein, and (for the purpose of resisting any internalpressure which may be'created, the front and back sides of the V,twoframe sections are `connected by appropriate stay-bolts 25.

In connection with the frame structure i above described, I prefer toemploy a verti- V cally sliding hollow door 26 mounted at the outer sideof the frame in suitable guides 27 and adapted to be raised and loweredby a chain 28 or any other adequate means. Cold water is fed to thebottom of the door 26 through appropriate water inlet pipes 29, the hotwater is carried from n said door through pipes 30, and vents 31 areemployed to allow the escape of steam, since such steam i is formedfroml the terific heat, even though both the outer and inner Sides ofthe door are prefei'ablyrlined with lire clay, as indi-4 V cated at 32.l

Attention may here be directed to the fact that the doorA 26vfits rathertightly against the outer side of the door frame, the connecting meansbetween the several sections of the door and frame.

said frame being such as to interfere in no manner with'r thiscontact,thus preventing the escape of any flame and gases between The interiorof the furnace may be viewed whenever necessary through the peep-pipe 33which is normally closed how-everdby an appropriate damper 34. vFromtime to'time, when sediment collects in the hollow door and frame, suchsedimentl may be withdrawn by removing the screw-plugs 35 and drainingall water from the door and frame.

By constructing my invention in the novel manner shown and described, itwillv be highly efficient and in every way desirable, and I thereforeprefer to employ the several details disclosed. Nevertheless, it is tobe understood that within the scope of the invention as claimed,numerous minor changes may well be made.

I claim: g The combination with a metal furnace having a rectangulardoor opening; of an arched water-cooled door snugly in said dooropening, the crown of said frame having the upper and lower halves ofits back wall offset horizontally, forming a horizontal ledge extendingforwardly from the upper edge of said lower half and a vertical wallrising from the front edge of said ledge, said ledge and wall jointlyproviding a right-angular seatjeX- tending throughout the length of'said crown,

a rigid beam snugly received in said seat frameY fittingv and anchoredat its ends in the furnace wall, means rigidly securing said verticalwall to y -said beam to reinforce said crown;v said crown beingtransversely divided at its central point into two sections, a pair ofvangle iron bars extending longitudinally along the upper edges of'saidsections and having vtheir inner ends bent to form upstanding lugsdisposed in contact with each other, means securing said lugs together,one flange of each angle iron bar being secured to said crown vwhile theother flanges ofsaid bars are embedded in the furnace wall, a pair ofrelatively short angle iron bars having horizontal flanges extendingtransversely of and secured to the lower edges of the aforesaid crownsections, said bars having vertical flanges in contact with each other,vVand means securing these vertical anges together. A y

In testimony whereof I havel hereunto set myv hand.

GEORGE Law.

